Neumatic conveying mechanism



narrar orrifcs.

GEORGE A. ernennen, or onnvniinivn eine.

.NEUMATIG CONVEYING MECHANISM.

iseaeas.

Specification of Letters Patent. Patented Fab. 2v2, 1921,

. .a I l Application tiled January 2, y19320. Serial ilo. 348,854.

To all whom t may concern.'

Be it known that I, GEORGE A. Ginsnmin, a citizen of Germany, residingat Cleveland, Chio, have invented certain new and use ful Improvementsin Pneumaticl Conveying Mechanisms, of which the following is aspecification.

The invention relates particularly l to mechanism for pneumaticallyconveying 'powdered or pulverized or granular material. Such-mechanismfrequently includes a iiexible pipe or hose at the end of which is anozzle which :is placed on or in the material to be conveyed. Thematerial is drawn into the nozzle and through theipe. Frequently aplurality of such flexible receiving pipes are used in a singleinstallation. When the distance the material is to bc conveyed .is notgreat it is possible, and sometimes convenient, to continue eachreceiving pipe to the place of deposit. Frequently, however', it isdesirable and economical to attach a plurality of receiving pipes to asingle dclivieiy pipe through which the mate rial may be delivered tothe point of deposit. Suction is applied so as to tend to create avacuum in the pipes and So draw the material to beconveyed through thereceiving pipe and into and through the delivery pipe.

Where a plurality of streams of material come together at the pointwhere the receiving pipes imite into the delivery pipe there isliability of a blockade or jamming of the material. More or less hardlum s may get caught at this point and be packet in tightly or withfiner material. This has sometimes necessitated shutting down the pumpcreating the vacuum and disassembling the apparatus to remove thematerialA blockuig the passage. One result of this has'been that it hasfrequently seemed economical to install long stretches ot individualdelivery pipes for each individual receiving pipe rather thancontemplate the delays and expensive operation necessary to clean awaythe frequently occurring blockades incident to the use ot a lsingledelivery pipe with a plurality of receiving pipes.

It is a purpose et my invention to provide a system involving a singledelivery pipe supplied with a plurality of receiving pipes which willvnot have the disadvantages above set out.

One form the invention may take is indicated in the accompanyingdrawings in which Figure'l is a. iront elevation of a.

the conveyed material.

joint betweeii'a; delivery pipe and a plurality of receiving pipes madein accordance with the invention ;l Fig. 2 is a transverse verticalsection of a relieving valve and Fig. 3 is a top plan view of therelieving valve.

A delivery pipe 1 is preferably made of metal and rigidly held in place.Only the end of this pipe is shown but it will be understood that itWill extend any suitable distance to the point of'd'eppsit or storage oflivery pipe two receiving pi es 2 are shown each provided With flexibleose portions 3 which are provided at their ends ywith nozzles (notshown) of any suitable form to be placed in or on the material to beconveyed. In an extension 4 of the delivery pipe 1 is a valve chamber 5having within it a partial diaphragm 6 through which extends the stein 7of a valve 8. The stem 7 is provided with a nut 9 to hold it from assingthrough the hole in the partial diaphragm land also ato adjust thedistance between the valve 8 and the valve seat 10 which is formed atthe' lower end of the valve chamber 5. The

valve stem 7 is prolonged beyond the valve l8 and carries a plurality ofweights 1l.

'Ilie number and weiglitof the blocks 1l ma be varied at will to adapt`the valve for di erent conditions of operation. A. nut.12

is shown to hold the weights 11 in place on ntering the de-V the valvestem 7. When the apparatus is l not in use the Weights hold the nut 9`close against the partial diaphragm 6 thereby causing the valve 8 tostayaway fromxthe valve seat l0. This position is shownlin Fig. 2. Inoperation a partial vacuum is created in the delivery pipe l therebycausing material to be sucked up through lthe receiving pipes 3. Thevacuum' thus created is lnormally sufficient to overcome xthe weights 11and cause the valve'S to be closed against its seat 10. l The materialfrom the receiving pipes?)l enters the delivery pipe 1 frequently ingreat quantities and at hi h speed. Irequently the material. because inlumps or for other reasons arranges itself in such a way as to jam orblock that pipe, land thus the passage of material may be impeded or stoped. At this time the vacuum in the extension 4 of the delivery pipe '1y will decrease and Will finally reach a' oint at which the weights 11will overcome t e suction and.v

consequently force the'valve Stp open automatically from its seat 10.This will allow air at atmospheric pressure toenter'the dedelivery pipe,receiving pipes entering the vlivery pipe l et its point of junctionwith the extensions 2 of the receiving pipes 3. The

pressure thus exerted automatically on the materials-blockin the pipeswill be suiiicientto fcrcethe jammed material through the delivery p`i e1 thus setting the apparat'us into norma'action again at which time ,therenewed vacuum' in the extension 4 Will causenthe vaive8 to closeagainst its seat 10 until `another block occurs or the operation of theapparatus is discontinued. It is thus possible to employ a plurality ofreceiving pipes for quickly conveying a large quantity of material inconjunction With a single delivery pipe and insure continuous eiiicientworking of a relatively cheap installation.

The details of the mechanism shown and described are illustrative butare not essential to the invention.

I claim as my invention:

' 1. Inpneumatic conveying mechanism, a

delivery pipe, a plurality of receiving pipes entering the deliverypipe, and automatic means for relieving a block in the pipes.

.2. In pneumatic conveying mechanism, a

delivery pipe, and automatic relieving mech amsm at the `junction of thepipes.

3. In pneumatic conveying mechanism, a A

delivery plpe, receiving pipes entering the. delivery pipe, andautomatic means for admitting atmospheric air at the junction of thepipes.

4. ln pneumatic conveying mechanism, a delivery pipe, receiving pipesmeetingA the delivery pipe at an angle, a relief 'pipe between thereceiving pipes, an air valve in the relief pipe and means on the valveto cause it'to open when the conveyed material blocksv junction of thereceiving'and delivery delivery pipe at an angle, an airvvalve ,at

the junction of the receiving` and delivery 1 pipes, and Weights on thevalve to cause itto open when the conve` ed material blocks. 55:

e o. apmseLEn.

